Shaper feed mechanism



June 17, 1930.

w. F. ZIMMERMANN SHAPER FEED MECHANISM Filed March 5. 192a 4 Sheets-Shet1 @31 WWW June 17, 1930. w, zm E M N 1,764,092

SHAPER FEED MECHANISM Filed March 5 1 4 Sheets-Shee 2 W 6 n I T N .3 U)t H H Q u an I "I W I E l L :3 N I H E! w w w F i v I N H I I 0 I i x-7%! June 17, 1930. w. F. ZIMMERMANN I I SHAPER FEED MECHANISM 4Sheets-Sheet 3 Filed March 5, 1926 -June 17, 1930. w. FQZIMMERMANN 1764,092

SHAPER FEED MECHANISM Filed March 5, 1926 4 Sheets-Sheet ,4

Patented June 17, 1930 UNITED SATES WILLIAM F. ZIMMERIi/IANN, 0FIlIAPLEWOOD, NEW JERSEY, ASSIGNOR 'iO GOULD &'

EBERHARD'I, OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY SHAPERFEED MECHANISM Application filed March 5, 1926. Serial No. 92,561.

This invention is devoted to the organization of shaping-machines withspecial rela tion to the means for feeding the work. As the work on thetable may be narrow or wide and, as the portion to be machined may benear to or far from the main frame, it is customary to provide the ramwith corresponding adjustments, 1. e. (l) to vary its overhang, (2) tovary its length of stroke and (3) to vary its frequency of stroke. It islikewise desirable to be able to adjust the length of the feed-stroke ofthe table so that the tool may take heavier or lighter cuts according tothe material and the finish, and it is desirable that the direction offeed may be reversible. It is also necessary that the advances of thework-table shall be made whi e the tool is out of the work and, toattain the utmost smoothness of action, it is desirable that the'feed'stroke shall start not too long after the tool leaves the work andbe completed ust before the tool, again engages the work; this beingespecially desirable when the strokes of the ram are short in length butrapid in frequency a *e: "are leave only yery short non-cutting oll Jdsfor accomplishing the advance of thetablc.

The regulation of the length of the feedstroke should be possiblewithout disturbing the timing of the feed with the rain, and to enablethe user to attain the maximum feed safe for the work in'hand, he shouldbe able to make the regulation while the machine is running and thehand-grasp should at all times be .free from movement or oscillation.And for structural reasons, the mechanism for converting the continuousmotion into the intermittent feed mo tion (as well as its regulatingmeans) should be simple, compact, quiet and in the nature of aself-contained unit. These are within the objectives of this invention.

To keep the pawl always in contact with the ratchet wheel, and toavoid.- starting its advance when not already in tooth-engagement, is anaim of the invention; the regulation or" the length of the feed-strokebeing now accomplished, not by swinging the pawl through a fixed len thof arc and lifting it out of engagement during an adjustable portion ofits swing, but by regulating the length of its arc of swing yet alwayskeeping it against the ratchet wheel. in the present form, a stationaryor inert stop is shiftable into dillerent fi xed positions and itthereby limits the return-stroke of the pawl and thus regulates theextent of the lost-motion between the pawl and an actuator whichperiodically oscillates through a fixed arc. When the actuator retreats,it is quietly and smoothly followed by the pawl to the extent permittedby the station to w ich the inert stop has been adjusted; vhereupon theactuator continues its retreat unaccompanied and there isno noisysnap-back of the pawl. When the actuator advances,it goes alone untilthe adjustable lost-motion has been taken up, and

it then pushes the pawl forward to the end of the advanced stroke. Thelimit of the advance stroke of the pawl always occupies an invariableposition, but the limit of the return of the'pawl occupies whateverposi- 'tion has been selected by the adjustment.

This principle, involving an inert stop (adjustable into variouspositions) cooperating with an actuator to hold a pawl-shifting springalways under restraint, is the basis of one of the objects of thepresent invention; the spring being-never able suddenly to shift thepawl but restrained to move it no faster than the travel of theactuator. Thus is avoided the objectionable snapback and the action iscorrespondingly quieted.

In point of general"organization, this invention aims to loeateat thecross-rail (a) a converter for deriving oscillatoryniotion fromcontinuous motion (b) a stationary regulator for determining theamplitude of oscillation and (0) a stationary directional control. Also,it aims, through the agency of a single uni-directional' shaft(extending from the main-frame to the cross-rail) which rotates once foreach tool stroke, to convey the motion to the converter.

In a feeding mechanism constructed in accordance with my invention aswivel and spline, shaft has one end thereof connected fixed arc.

to the crank gear mechanism and has the other end. thereof supported onthe crossrail. shaft operates a crank mechanism on the cross-rail inaccordance with the reciprocating movement of the ram. The crankmechanism in turn oscillates a lever through a The oscillating lever ismounted on a feed shaft adjacent to a pawl lever and 'a stop member. Thepawl lever has a portion thereof extending into the path of' movement ofa projection from the oscillat- *ing lever so as to be moved by theoscillating lever. A spring member is provided for ex- 5 erting a forcetending to'hold the pawl lever in engagement with theprojection from theoscillat ng lever. The stop member, which is"a dju'stable to variouspositions, serves to limit the movement of the pawl lever with theoscillating lever. The position of the stop member serves to determinethe rate of feed as will be explained hereinafter. The pawl lever,through a pawl and ratchet mechanism and a friction clutch, effectsintermittent rotative movement of a feed shaft. The feed shaft isconnected to the feed screw through a gear mechanism which may becontrolled to vary thedirection of rotation of the feedscrew andaccordingly to vary the direction of the feeding movements of the tableon the rail. The direction. of the feeding movements effected by thetable is fcontrolled by a hand grasp having a stationary pivot on therail :and therlfite. of feeding is controlled by a hand grasp which;

may be operated when'the machine is in operation. 1 V I 7 Otherobjectsand advantages will bein 7 part indicated in the followingdescription parts throughout all the views, of which:-

I.Figure 1 is an elevationalview of as iaper having a lfeedjniechanismconstructed in ac- CQIClance with my invention. Fig.2 is a sectionalview along the line 22.of Fig, 1. Fig. 3i's a sectional view alongtheline 8-3 of Fig. 2. Fig. 4 is a sectional view along 'the line H of Fig.2. Fig. 5 is a sectional view along the line 5-5 of Fig. 2. Fig.- 6

is an isolated view of the oscillating lever looking in a directionopposite to Fig. 5. Fig. 7 is a detailed view of the stop member. Fig. 8is a detail View of theoscillating lever,

' stop member and the pawl lever.

' Referring to the accompanying drawings and particularly to Fig. 1,ashaper 1 is illus- I The continuously rotating universal movement ofthe shaft.

trated comprisinga main frame 2, a reciprocating rain 3, and awork-carrying table 4. The rain 3 is reciprocated on suitable ways bymeans of a rocker arm 5 which is operated in a conventional manner bymeans of a crank gear wheel 6. A tool-head 7, which is mounted onthe ram3, carries a suitablecutting tool 8 for operating on the work carried bythe table 4. The work-carrying table 4 is mounted on a cross rail 9 andis moved along the cross rail in a horizontal direction by means of afeed screw 10. The cross rail 9 is vertically movable on the main frameof the machine in a conventional manner.

Referring to Fig. 2 of the drawings, the crank wheel 6 is journaled in ahub 12 projecting from the main frame 2 of the machine. gear wheel 6 bybolts 14, one only of which is illustrated, carries a bevel-gear wheelfor operating the table feed mechanism. The bevel-gear wheel 15 issecured to the plate 13 by bolts 16, one only of which is shown in Fig.2 of the drawings. A shaft 17, which controls the stroke of the ram 3 ina conventional and well-known manner, projects through the bevel-gearwheel 15 and the plate 13 and is provided with a bearing in a bracket orhousing 2 which is secured to the hub 12. A squared end 18on the shaft17 is adapted to be engaged by a crank handle for controlling the throwof the rocker arm 5, and accordinglythe stroke of theram 3. A bushing 19on the shaft 17 and a hand-grasp 20 are provided for preventinglongitudinal The bevel-gear vheel 115, which is secured to the plate 13,meshes with a bevel-gear wheel 21 which is connected to a universalshaft 22. A hub portion 23 0f the bevel gear wheel 21 is supported by, abushing 24 in the housing 2. A suitable" washer or collar 5 l 1. L, J aa 2' 1s provlded between the beve g ar whee 21 and the housing 2 asshown inFig. 2" of allow for the vertical movement'of the crossrail 9with respect to themain frame 2; An end link 27 of the universal shaft22 sup- A plate 13,; which is secured to the ported in the casing 26 bymeans of a bushing 28 and-a crank ar1n29 is secured tothe link 27 bymeans of a pin 30. The crank I arm 29" is connected to an oscillatinglever 31 by means of two pins 32 and 33 and a-link 3i. -:The pin 32 isfixedly secured tothe crank arm 29 by means ofa pin355 'Axbushing 36 isprovided for rotativelysupporting the link 34 on the pin 32. Thepin 33is fixedly mounted in the oscillatinglever 31 and permits free rotativemovement of the:

link 84: thereon. The pin 33 not only conf nectsthe'link 34 of theoscillating lever 31" The projecting portion 38 is provided VVlL asuitable cushion 40, preferablyconstru t ed ofleather, for engaging thepawl lover. The oscillating lever 31 is'provided with a bearing in awall 41 of the casing 26 and the pawl lever 39 is rotatively mounted ona feed shaft 42. The feed shaft 42 projects through the oscillatinglever 31 for operating the feed screw in manner to be hereinafter setforth.

Referring particularly to Figs. 3, 5, 6 and 8, the operation of the pawllever 39 by the oscillating lever 31 will be described. The oscillatinglever 31, as above set forth, ries the pin 33, which has a leathercushion for engaging the pawl lever 39. The leather cushion 40 engages asurface 44 on the pawl lever as best shown in Fig. 5 of the drawings. Aspring member 45, which has one end connected to the pawl lever and theother end thereof connected to 2. lug 46' on the casing 26, serves toexert a force tending to hold the pawl nember 39 in engagement with thepin 33 on the oscillatin lever 31. The oscillating lever 31 ow through afixed arc by reason of the continuous rotation of the crank arm 29. Thecrank arm 29, as above set forth, i co rotated by means of the unive 'alshaft Thus, if the pawl lever 39 is held in engage ment with theoscillating lever 31 at all times by the spring member 45 such pawllever will effect oscillations through the same are as theoscillatinglever 31. lf-iowever, a stop member 46 is provided forlimiting the movement of the pawl lever ith the oscillating lever.

The stop member 46 is rotatably mounted on a hub portion 47 of the pawllever 39 and worm teeth 48 are formed on the perimeter of the stopmember 46, as shown in Figs. 3 and S of the drawings. The worm teeth 48mesh with a worm 50 which is formed on an adjusted shaft 51. The shaft51 and the worm 50 serve to adjust the position of the stop member 46and accordingly to vary the rate of feeding effected by the worlr table4.. The shaft 51 is journaled in the casing 26, as shown in Figs. 4 and5 of drawings. and is held against longitudinal movement by means of ashoulder 52, which is formed on the shaft, and a collar 53 which ispinned to the shaft. Ahand grasp 54whichis proided with a knurled end issplined to the shaft 51 and serves as a means for adjusting the rate oftable feed. A spring member 526, which surrounds the shaft 51 as shownin Fig. 4 of the drawings, is positioned between a shoulder 57 formed onthe hand grasp 54 and a shoulder 58 which is formed on the shaft 51.Such spring 56 serves to exert a force tending to hold the hand grasp inengagement with the side of the casing 26. A pin 59, which is secured tothe casing 26, is adapted to enter holes 60 which are formed lated,

through which the pawl lever 39 is in flan e 61 of the hand grasp 54..The pin oilcooperating with holes 60 serves. to hold the feed adjustingmechanismin any set position. The holes 60 are positioned, in

the, flange 61 to effect. any predetermined rate.

of feed and a scale 62 is formed on the poli neter of the flange 61 to.indicate the rate at which he feed will be effected.

The stop member 46 is provided with a projection 64 for engaging thepawl lever 39. The, pawl lever 39 is provided with a surface 65 having acushion of any suitable material, such for example as leather 66, forengaging the projection 64. The leather cushions40 and 66, on the pin 33and the pawl lever 39 are not absolutely essential but serve toinsure'more silent operation of the various levers and prevent theclicking noise which otherwise would be produced. The pawl lever carriesa, pawl member 67 which is adapted to engage ratchet teeth- 68 formed onthe perimeter of a, clutch member 69. Theclutch teeth 68 form awell-known one-way ratchet so that the pawl member 67 only operativelyengages the teeth in one direction of movement of the pawl lever 39.Thus, the clutch member 69, is only moved. with the pawl lever 39 whenthe pawl lever is moved in a counter-clockwise directionas Viewed inFigs. 4 or 5 of the drawings.

A plunger 70, which is mounted in an orifice 71 formed in the pawl lever39 is held in engagement with the end of the. pawl 67 by means of aspring 72 to hold the pawl member in engagement with the ratchet teeth63. The clutch member 69 is rotatively mount ed on the feed shaft 42 andis connected by friction means to a driven clutch member 7 6 which iskeyed to the shaft 42. A plate 77 is held in engagement with a shoulder78 on the feed shaft 42 by means of spring members 79 located in holesformed in the clutch member 69. The plate '2'"? is compelled to rotatewith the clutch member 69 by means of a pin 80 which is best shown inFig. 3 of the drawings. The spring members 79 engaging the plate 77force the clutch member 69 into a cup-shaped orifice formed in thedriven member 76 and into f engagement with a leather friction plate Theamount of friction produced between the driving and driven memberscontrolled b means of the nut 33 which is threadablv 7 connected to theend OI the shaft 42.

Br1efly revlewing the o eration of the parts so .far described, whichare' mount-ed 1n the casing 26, it will be noted the lever 31 iscontinuously oscillated through fixed are by means. of the constant roten of the crank lever 29. The constant oscilla the oscillating lever 31effects oscn' movement of the pawl lever Tl lated,-is determined inaccordance with the position of the stop member 46. The stop I membermay be so set as to permit the pawl I lever to be held in engagementwith the oscillating lever at all times. Insuch case the pawl leverwould be oscillated through the same are as the oscillating lever31. Re-

ferring to Fig. of the drawings the operation of the stop member 46 incontrolling the arc through whichthe pawl lever 39 is vibrated will bedescribed. In this description it will be assumed the crank-arm 29 isconstantly rotated in a counter-clockwise direction as viewed in Fig. 5of he drawings.

' wheels 91 and 92 on'the feed screw'lO.

bevel gear wheel 90 is fixedly mounted on The counter-clockwise rotationof the crank lever 29 will first cause a movement of. the oscillatinglever 31 in a counter-clockwise direction to engage the pawl lever 39and movesuch pawl lever in a counter-clockwise 7 direction against thetension ofthe spring WVhen the oscillating lever 31 reaches the extremeend of its counter-clockwise movement and starts its return movement ina clockwise direction, the spring member 45 holds the pawl lever 39 inengagement with it. However, the stop member 46 may. be

P set by means of the hand grasp 54; in a position to stop the movementof the pawl member 39 before the oscillating lever 31 has reached itsextreme travel in a clockwise stroke of the ram 3. The amount ofmovement of the pawl lever 39 during the return stroke of the ram isdetermined in accordance with the position of the stop member 16. Invery small feeds the pawl member 39 would only be engaged by theoscillating lever 31 at the extreme end of the return stroke of the ram.i

The feed shaft 42 carries a bevel gear Wheel which meshes with two bevelgear The the feed shaft 42 and the bevel gear wheels 91 and 92 arerotatively mounted on the feed screw 10. FA clutch .member 93 1s splinedto the feed screw 10, as shown in Fig. 2 of the drawings, and isprovided with clutch teeth 9% and 95 which are respectively adapted toengage clutch teeth 96 and 97 on the bevel gear wheels 91 and 92. Thus,the clutch member 93 may s moved into engagement with'the teeth 96 onthe bevel gear wheel91 for rotating the feed screw 10 in one directionand maybe moved into engagement with'the clutch teeth 97 on'the bevelgear wheel 92 for. rotating the feed screw in an opposite direction, Theclutch member 93 is shifted on the feed screw 10 by meansof a shaft- 99.An eccentric pin 100, secured to one end of the shaft 99, is

fitted to a groove l01formed in the clutch member 93. The shaft 99 isprovided with opening formed in the casing 26, as shown in Fig. 7 3 ofthe drawings and engages notches 104 formed inthe shaft 99 for bold ingthe clutch member 93 in a neutral or an operative position. 1

Reviewing the operation of the feed mechanism it will be notedcontinuousrotative movement is supplied'from the crank gear wheel 6 tothe feed mechanism in the casing 26 by means of the universal shaft 22.Such shaft 22 is rotated directly in accordance with the movement of thereciprocating ram 3. The universal shaft 22 through the crank 29oscillates the lever 31 through a fixed arc. The oscillating lever '31oscillates the pawl lever 39 through an arc which isvaried according tothe positionof the stop member 46. The stop member 46,-which iscontrolled by the hand grasp 54, serves to determine the rate of feedingby the work table.

pawl member 67 and the clutch mechanism The pawl lever 39 by means ofthe COllIPllSlllgllllB driving and driven members 69 and 76 effectsintermittent movement of the feed shaft 12. The feed shaft 42 isconnected to the feed screw 10 through the bevel gear wheels 90, 91 and92 for operating the feed screw 10 according to the position of theclutch member 93. Thus, the rate of feed effected by the feed screw lOiscontrolled by the hand grasp 54 and the direction of feed effected bythe feed screw 10 is controlled by the handle 102. Both the hand grasp54 and the handle 102 are mounted on the cross rail 9.

I Without further analysis, the foregoing will so fully reveal the gistof this invention, that others can, by applying current knowl-' I edge,readily adapt it for various utilizations by retaining one or more ofthe features that, from the standpoint of the prior art, fairlyconstitute essential characteristics of either. the generic or specificaspects of this invention and, therefore, such adaptations should be,and are intended to be, comprehended within the meaning and range ofquivalen'cy of the following claims 'Having thus revealed thisinvention, I claim as new and desire to secure the followingcombinations and elements,;or equivalents thereof, by Letters Patent ofthe United States 1 1. A shaper a crank-gear wheel; feed meanscomprising a shaft rotating once for each stroke of the shaper ram andhaving one end geared'to feed mechanism comprising said crank 'gearwheel and the other e'nd thereof supported on the shaper cross rail; alever on the cross rail; means operated by said rotating shaftforoscillating said lever through a fixed arc; a pawl lever mounted on thecross rail and oscillated by said oscillating lever; means mounted onthe cross rail for varying the are through which said pawl lever isoscillated; a feed screw for mov the shaper table along the crossnet-wheel for intermittently rod d feed at ew in accordance with themovement of the pawl lever; and a bevelgear reverser between saidieet'l-screw and said ratchet wheel.

2. A feed mechanism for a shaper havin a cross-rail; a ram reciprocatedby a rotating crank gear wheel, feed means connected thereto andcomprising a shaft extending to said cross-rail. and continuouslyrotated in accordance with the rotation of the crank gear wheel; a levermounted on said crossrail; means operated by said shaft for oscillatingsaid lever through a fixed arc; pawllever oscillated by said oscillatinglever; means for varying the are through which said pawl lever isoscillated; a feed screw; a pawl and ratchet-wheel for operating thefeed screw in accordance with the movement of the pawl. lever; and amotion reverser between said ratchet-wheel and said feedscrew.

3. A shaper feed mechanism comprising a crank-gear wheel; continuouslyrotating shaft having one end thereof geared thereto and having itsother end supported on the shaper cross rail; an oscillating levermounted on the shaper cross rail; a crank mechanism operated by therotating shaft for oscillating said lever through a fixed arc; a pawllever mounted on the cross rail and oscillated invariably to the sameforward position by means of said oscillating lever; a stop member forlimiting the arm through which the pawl member may return; a feed screwfor feeding the shaper table along the cross rail; and means foroperating the feed screw in accordance with the movement of the pawllever.

4. A feed mechanism for a shaper having a ram operated by a crank gearwheel and comprising a shaft continuously rotated by.

said gear wheel once for each stroke of the ram; a lever; a cross-railcarrying said. lever; means operated by the rotating shaft forpositively oscillating said lever to and fro through a definite arc; apawl lever moved positively by the oscillating lever during the returnstroke of the ram; a spring for causing said pawl-lever to return withsaid other lever; a stop mounted coaxially with said pawl-lever forlimiting the return-movement of the pawl lever; a stationary hand-graspfor shifting said stop about its axis; a feed screw for moving theshaper table along the cross rail; and means comprising a constantlyengaged pawl and ratchet-Wheel for operating said feed screw ver mountedon the shaper cross rail; means operated the rotatn'ig sl aft foroscillating the lever through a efinite arc; a pawl lever advancedalways to the same foremost station by the oscillating lever during thereturn stroke of the ram; a spring for keeping said levels in contactduring the first por-v tion of the return-strol't'e of said lever; afeed screw for moving the shaper table along the cross rail; and meansfor operating said feed screw by the pawl lever during the latter partof the ram return stroke.

6. A shaper feed mechanism comprising a ram; a cranlr-gear wheel; across-rail; a rotating shaft driven by said wheel and having one endthereof supported on the cross rail; a lever on said cross-railoscillated through a fixed are by said rotating shaft, a pawl leverrotatably mounted concentric with said oscillating lever and having aportion thereof in the path of movement of a projection from theoscillating lever; resilient means for exertii'ig a force tending tohold said pawl lever in engagement with said oscillating lever;adjustable stop member for limiting the period contact between the pawllever and the oscillating lever during its return stroke; and a feedshaft intermittently operated by said pawl lever.

7. A shaper feed mechanism comprising a crank-gear wheel; feed meansgeared thereto and including an unidirectional rotating shaft having oneend thereof supported on the cross rail; a lever mounted on the crossrail; means operated by said shaft for oscillating the lever through afixed arc; a pin projecting from the side of the lever; a rotatable pawllever mounted concentric with said oscillating lever and having aportionthereof in the pathof movement of said pin; an adjustable stop memberalso mounted concentric with said oscillating lever for limiting themovement of the pawl lever in one direction; a resilient member forexerting a force tending to hold the aid wheel and rail and connected tosaid table; a universal shaft rotated in a uniform direction by saidcrank gearwheel; a feed shaft mounted on the cross rail and adapted tobe connected 'to said feed screw; a lever mounted concentric with saidfeed shaft and oscillated through a given are by means of said universalshaft; a pawl lever rotatably mounted on said feed shaft and oscillatedthrough various arcs by means of said lever; a stop rotatably mounted onsaid pawl lever for controlling the oscillating movement of the pawllever; resilient means for exerting a force tending to hold the pawllever in engagement with the stop and in position to be engaged by theoscillating lever; a worm and worm-wheel for shifting said stop; andmeans controlled by said pawl lever for op erating the feed shaft toeffect feeding movement by the feed'screw.

9. A shaper feed mechanism comprising a shaft continuously rotated inone direction once for each stroke of the shaper ram; means forconverting said rotary movement of the shaft into oscillatory movementat a point on the cross rail; stationary means comprising a worm on thecross rail for varying the arc of said oscillatory movements to vary thefeeding rate; and means operated by said oscillatoryumovements foreffecting feeding movements of the work table in either direction.

V In witness whereof, I have hereunto subscribed my name. I

7 WILLIAM F. ZIMMERMANN.

CERTIFICATE OF CORRECTION.

Patent No. 1, 764,092. Granted June 17, 1930, to

WILLIAM F. ZIMMERMANN.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 5,line 40, claim 3, for the word "arm" read are; and that the said LettersPatent should be read with this correction therein that the same mayconform to the record of the case in the Patent Office.

Signed and sealed thi s 9th day of September, A. D. 1930.

M. J. Moore, (Seal) Acting Commissioner of Patents.

(Seal) CERTIFICATE OF CORRECTION. Patent No. 1,764,092. Granted june.17, .1930, to WILLIAM F. ZIMMERMANN.

It is hereby certified that error appears. in the printed specificationof the above numbered patent requiring correction as follows: Page 5,line 40, claim 3, for the Word "arm" read are; and that the said Letteerein that the same may conform in the Patent Office.

This certificate supersedes Certificate of Correction issued Sept-ember9, 1930. Signed and sealed this 23rd day of September, A. D. 1930.

M. J. Moore, Acting Commissioner of Paten'ts.

